DSpace at My UniversityThe DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.http://localhost:8080/xmlui2024-03-28T22:51:32Z2024-03-28T22:51:32ZSynergistically modified Ti3C2Tx MXene conducting polymer nanocomposites as efficient electrode materials for supercapacitorsVarghese, S MMohan, V VSuresh, SGowd, E BRakhi, R Bhttp://localhost:8080/xmlui/handle/123456789/47992024-03-21T15:26:13Z2024-02-05T00:00:00ZSynergistically modified Ti3C2Tx MXene conducting polymer nanocomposites as efficient electrode materials for supercapacitors
Varghese, S M; Mohan, V V; Suresh, S; Gowd, E B; Rakhi, R B
MXene-conducting polymers have attracted significant research attention as exceptional electrode materials for energy storage applications. Herein, we report the synthesis of titanium carbide MXene via exfoliation, succeeded by one-step oxidative polymerization and surface modification with polypyrrole (PPy) and polyaniline (PANI). Electrochemical characterizations conducted in a symmetric two-electrode assembly reveal that the MXene-PANI electrode supercapacitor demonstrates a specific capacitance of 430 F g−1, surpassing both MXene-PPy (305 F g−1) and pure MXene (105 F g−1) supercapacitors. Furthermore, the MXene-PANI symmetric supercapacitor demonstrates a specific energy of 38 Wh kg−1 at a specific power of 808 W kg−1. The MXene-PANI and MXene-PPy electrode materials exhibited a capacitance retention of 84% and 85% respectively, after 10,000 continuous GCD cycles. The study highlights the application of MXene-polymer nanocomposites as efficient electrode materials for supercapacitors.
2024-02-05T00:00:00ZCarbide-derived carbon by room temperature chemical etching of MAX phase for supercapacitor applicationVarghese, S MSarath Kumar, S RRakhi, R Bhttp://localhost:8080/xmlui/handle/123456789/47982024-03-21T15:17:41Z2024-01-08T00:00:00ZCarbide-derived carbon by room temperature chemical etching of MAX phase for supercapacitor application
Varghese, S M; Sarath Kumar, S R; Rakhi, R B
Porous carbons have attracted substantial interest within the realm of energy storage applications. However, their traditional production methods often involve the use of elevated temperatures. In this study, we introduce a simple technique to transform titanium silicon carbide (Ti3SiC2) MAX phases into porous carbons, known as carbide-derived carbons (CDCs), at room temperature by selective etching of the metal atoms (Ti and Si). We investigate how temperature affects the activation of CDCs so formed with potassium hydroxide to enhance their electrochemical properties. Our results unveil the remarkable potential of CDCs activated at 700 °C, demonstrating superior electrochemical performance with a specific capacitance of 198 F g−1 at a scan rate of 20 mV s−1 in a three-electrode configuration. The symmetric supercapacitor based on CDC-700 maintains a respectable specific capacitance of 98 F g−1 at 1 A g−1 and an energy density of 13.7 Wh kg−1 at a power density of 1 kW kg−1. This cost-effective approach offers a pathway for large-scale CDC production, with excellent specific supercapacitor characteristics, promising advancements in energy storage technology.
2024-01-08T00:00:00ZNanoassembling of Thixotropically Reversible Alumino-siloxane Hybrid Gels to Hierarchically Porous Aerogel FrameworkLinsha, VMohamed, A PAnanthakumar, Shttp://localhost:8080/xmlui/handle/123456789/47972024-03-01T07:51:17Z2015-01-01T00:00:00ZNanoassembling of Thixotropically Reversible Alumino-siloxane Hybrid Gels to Hierarchically Porous Aerogel Framework
Linsha, V; Mohamed, A P; Ananthakumar, S
This work describes a versatile strategy for the formation of thixotropically reversible alumino-siloxane
hybrid gel suitable for the fabrication of open-porous aerogel like framework. Aminated alumino-siloxane gel was synthesized by pH controlled sol–gel assisted co-condensation of hydrolyzed aluminum isopropoxide with 3-aminopropyltrimethoxy silane. A rare reversible thixotropic flow behavior was noticed
for the first time in aminated alumino-siloxane hybrid gel. The hybrid gel was used for preparation of
hydrogel microspheres via gel granulation technique. The hydrogel microspheres derived from thixotropic gel showed an open porous network with intercommunicated structure. It was then converted to
aerogel microspheres, without the collapse of the transient hybrid porous network by ambient pressure
drying technique. The porous framework was tailored to hierarchical domains containing meso/macro
porosity, with a dense array of functional amine on internal porous framework. The textural properties
of the hybrid alumino-siloxane aerogel microspheres have been characterized by SEM, TEM, FTIR and
N2 gas adsorption/desorption analysis and the results are discussed. Hybrid aerogel microspheres exhibit
2–3 times superior properties in terms of surface area and pore features compared to their xerogel counterparts. Thus, open porous aerogel microsphere derived from thixotropic gel could be a new media for
controlling host–guest interactions especially when it is intended to be used in adsorption, separation
and catalysis/catalyst support.
2015-01-01T00:00:00Z'Nowa' technology for biological wastewater treatmentJanmabhumiKalakaumudiKalabhooshanamMadhyamamMangalamMetro VaarthaSirajThe HinduVeekshanamhttp://localhost:8080/xmlui/handle/123456789/47962024-03-01T07:50:46Z2024-02-28T00:00:00Z'Nowa' technology for biological wastewater treatment
Janmabhumi; Kalakaumudi; Kalabhooshanam; Madhyamam; Mangalam; Metro Vaartha; Siraj; The Hindu; Veekshanam
2024-02-28T00:00:00Z